BMI Calculator: Calculate Your Body Mass Index

Understanding your body weight can be an important part of maintaining a healthy lifestyle. Our free BMI Calculator helps you quickly estimate your Body Mass Index using your weight and height. Simply enter your weight in kilograms and your height in feet and inches, then click Calculate BMI to see your result.

What Is BMI?

BMI stands for Body Mass Index. It is a simple measurement that compares a person’s weight with their height. BMI is commonly used as a general screening tool to identify whether an adult’s weight falls within an underweight, normal-weight, overweight, or obesity range.

BMI is useful for getting a quick overview of your weight status, but it does not directly measure body fat or overall health.

How to Use Our BMI Calculator

Using the calculator is simple:

Enter your weight in kilograms (kg).

Enter your height in feet.

Enter the remaining height in inches.

Click the Calculate BMI button.

Your BMI score and category will appear instantly.

For example, if your height is 5 feet 3 inches, enter 5 in the Feet box and 3 in the Inches box.

BMI Categories for Adults

For adults, BMI is generally interpreted using these categories:

BMICategoryBelow 18.5Underweight18.5 – 24.9Normal Weight25.0 – 29.9Overweight30.0 or higherObesity

These ranges are general guidelines and should not be considered a diagnosis.

What Does Your BMI Result Mean?

Underweight

A BMI below 18.5 falls within the underweight range. Being underweight can sometimes be associated with inadequate nutrition or other health factors. If you are concerned about your weight, consider discussing it with a qualified healthcare professional.

Normal Weight

A BMI between 18.5 and 24.9 falls within the normal-weight range. Maintaining a balanced diet, regular physical activity, good sleep, and healthy lifestyle habits can help support overall wellbeing.

Overweight

A BMI between 25 and 29.9 falls within the overweight range. Regular exercise and a balanced diet may help support healthy weight management.

Obesity

A BMI of 30 or above falls within the obesity range. If your BMI falls into this category, consider speaking with a healthcare professional who can help you understand your individual health and weight-management needs.

Is BMI Accurate for Everyone?

BMI is a useful general screening measurement, but it has limitations. It does not distinguish between muscle mass, bone mass, and body fat.

For example, athletes or people with significant muscle mass may have a higher BMI even when they have relatively low body fat. Age, sex, body composition, and other health factors can also affect how BMI should be interpreted.

For this reason, BMI should be considered one measurement among many, rather than a complete assessment of your health.

How Can You Maintain a Healthy Weight?

A healthy lifestyle does not depend on one number. Some useful habits include:

Eat a balanced and varied diet.

Include vegetables, fruits, whole grains, and protein sources.

Stay physically active.

Drink enough water.

Get adequate sleep.

Avoid excessive consumption of highly processed foods.

Set realistic and sustainable fitness goals.

Track your progress over time rather than focusing on a single measurement.

Frequently Asked Questions

What is a healthy BMI?

For most adults, a BMI between 18.5 and 24.9 is generally classified as normal weight. However, BMI is only a screening measure and does not provide a complete picture of health.

Can I calculate BMI without a calculator?

Yes. BMI is calculated using weight and height. Our online calculator makes the process easier by automatically converting your height from feet and inches and calculating the result for you.

Does BMI work for children?

Adult BMI categories should not be used to interpret children’s BMI. Children and teenagers require age- and sex-specific BMI interpretation, usually using growth charts.

Should I rely only on BMI?

No. BMI should be viewed as a general screening tool. Other factors such as waist circumference, body composition, activity level, diet, medical history, and overall wellbeing can also be important.

Final Thoughts

Our BMI Calculator provides a quick and convenient way to estimate your Body Mass Index. Enter your weight and height above to calculate your BMI and see the general category associated with your result.

Remember that BMI is not a diagnosis and cannot measure your complete health. For personalized advice about your weight, nutrition, or fitness goals, consult a qualified healthcare professional.